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BOSTON MARATHON 2025

Casper Jakobsen

Bib: 967•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 4%
Gender (Male)
#0 / 16105
Top 7%
Division (M18-39)
#0 / 5642
Top 16%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:54
Rank: #535
Start → 5K
17:54 | 5:46/mi
10K· 6.21 mi
35:41
Rank: #517 (+18)
5K → 10K
17:47 | 5:43/mi
15K· 9.32 mi
53:29
Rank: #480 (+37)
10K → 15K
17:48 | 5:44/mi
20K· 12.43 mi
1:11:44
Rank: #490 (-10)
15K → 20K
18:15 | 5:52/mi
Half· 13.11 mi
1:15:45
Rank: #496 (-6)
20K → Half
4:01 | 5:53/mi
25K· 15.53 mi
1:30:07
Rank: #492 (+4)
Half → 25K
14:22 | 5:56/mi
30K· 18.64 mi
1:49:37
Rank: #553 (-61)
25K → 30K
19:30 | 6:17/mi
20M
1:58:34
Rank: #614 (-61)
30K → 20M
8:57 | 6:35/mi
21M
2:05:44
Rank: #669 (-55)
20M → 21M
7:10 | 7:10/mi
35K· 21.75 mi
2:10:35
Rank: #699 (-30)
21M → 35K
4:51 | 6:29/mi
23M
2:19:02
Rank: #742 (-43)
35K → 23M
8:27 | 6:45/mi
24M
2:25:55
Rank: #805 (-63)
23M → 24M
6:53 | 6:53/mi
40K· 24.85 mi
2:32:30
Rank: #925 (-120)
24M → 40K
6:35 | 7:42/mi
25.2M
2:35:25
Rank: #976 (-51)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
2:42:56
Rank: #1115 (-139)
25.2M → Finish
7:31 | 7:23/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:45
Pace5:47 /mi
2nd Half
Distance13.11 mi
Time1:27:11
Pace6:39 /mi
📊Positive Split: 15.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:0817:545:4617:54
5:46
-
10K
6.21 mi10:35:5535:415:4517:47
5:43
-0:03
15K
9.32 mi10:53:4353:295:4417:48
5:44
+0:01
20K
12.43 mi11:11:581:11:445:4618:15
5:52
+0:08
Half
13.11 mi11:15:591:15:455:474:01
5:53
+0:01
25K
15.53 mi11:30:211:30:075:4814:22
5:56
+0:03
30K
18.64 mi11:49:511:49:375:5319:30
6:17
+0:21
20M
20.00 mi11:58:481:58:345:568:57
6:35
+0:18
21M
21.00 mi12:05:582:05:445:597:10
7:10
+0:35
35K
21.75 mi12:10:492:10:356:004:51
6:29
-0:41
23M
23.00 mi12:19:162:19:026:038:27
6:45
+0:16
24M
24.00 mi12:26:092:25:556:056:53
6:53
+0:08
40K
24.85 mi12:32:442:32:306:086:35
7:42
+0:49
25.2M
25.20 mi12:35:392:35:256:102:55
8:27
+0:45
Finish
26.22 mi12:43:102:42:566:137:31
7:23
-1:04

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

5:43 /mi

Average Pace

6:13 /mi

Slowest Pace

8:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:07

55% of race

Time at Steady Pace

41:45

26% of race

Time at Slower Pace

31:04

19% of race

Average Pace: 6:13 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:18:0817:545:4617:54
5:46
#535
10K
6.21 mi10:35:5535:415:4517:47
5:43
#517
15K
9.32 mi10:53:4353:295:4417:48
5:44
#480
20K
12.43 mi11:11:581:11:445:4618:15
5:52
#490
Half
13.11 mi11:15:591:15:455:474:01
5:53
#496
25K
15.53 mi11:30:211:30:075:4814:22
5:56
#492
30K
18.64 mi11:49:511:49:375:5319:30
6:17
#553
20M
20.00 mi11:58:481:58:345:568:57
6:35
#614
21M
21.00 mi12:05:582:05:445:597:10
7:10
#669
35K
21.75 mi12:10:492:10:356:004:51
6:29
#699
23M
23.00 mi12:19:162:19:026:038:27
6:45
#742
24M
24.00 mi12:26:092:25:556:056:53
6:53
#805
40K
24.85 mi12:32:442:32:306:086:35
7:42
#925
25.2M
25.20 mi12:35:392:35:256:102:55
8:27
#976
Finish
26.22 mi12:43:102:42:566:137:31
7:23
#1115
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi535497497422(Top 1%)392(Top 2%)392(Top 7%)
10K6.21 mi3.10 mi517+18479+18479+18494(Top 2%)457(Top 3%)457(Top 8%)
15K9.32 mi3.11 mi480+37443+36443+36422(Top 1%)392(Top 2%)392(Top 7%)
20K12.43 mi3.11 mi490-10454-11454-11564(Top 2%)521(Top 3%)521(Top 9%)
Half13.11 mi0.68 mi496-6460-6460-6826(Top 3%)780(Top 5%)780(Top 14%)
25K15.53 mi2.42 mi492+4456+4456+4631(Top 2%)584(Top 4%)584(Top 10%)
30K18.64 mi3.11 mi553-61508-52508-521133(Top 4%)1067(Top 7%)1067(Top 19%)
20M20.00 mi1.36 mi614-61567-59567-591955(Top 7%)1848(Top 11%)1848(Top 33%)
21M21.00 mi1.00 mi669-55622-55622-552950(Top 10%)2724(Top 17%)2724(Top 48%)
35K21.75 mi0.75 mi699-30651-29651-292339(Top 8%)2182(Top 14%)2182(Top 39%)
23M23.00 mi1.25 mi742-43693-42693-422441(Top 9%)2260(Top 14%)2260(Top 40%)
24M24.00 mi1.00 mi805-63754-61754-613948(Top 14%)3487(Top 22%)3487(Top 62%)
40K24.85 mi0.85 mi925-120868-114868-1148026(Top 28%)5988(Top 37%)5988(Top 106%)
25.2M25.20 mi0.35 mi976-51918-50918-508411(Top 30%)6096(Top 38%)6096(Top 108%)
Finish26.22 mi1.02 mi1115-1391051-1331051-1338265(Top 29%)6041(Top 38%)6041(Top 107%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

422

Males

392

M18-39

392

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

494

Males

457

M18-39

457

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

422

Males

392

M18-39

392

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

564

Males

521

M18-39

521

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

826

Males

780

M18-39

780

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

631

Males

584

M18-39

584

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1133

Males

1067

M18-39

1067

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1955

Males

1848

M18-39

1848

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2950

Males

2724

M18-39

2724

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2339

Males

2182

M18-39

2182

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2441

Males

2260

M18-39

2260

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3948

Males

3487

M18-39

3487

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

8026

Males

5988

M18-39

5988

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8411

Males

6096

M18-39

6096

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8265

Males

6041

M18-39

6041

Passing Analysis

Category:
Athletes Passed
158
Passed By
738
Net Change
-580
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#535
5K → 10K3921+18#535#517
10K → 15K469+37#517#480
15K → 20K1626-10#480#490
20K → Half06-6#490#496
Half → 25K2016+4#496#492
25K → 30K970-61#492#553
30K → 20M162-61#553#614
20M → 21M661-55#614#669
21M → 35K838-30#669#699
35K → 23M649-43#699#742
23M → 24M568-63#742#805
24M → 40K0120-120#805#925
40K → 25.2M253-51#925#976
25.2M → Finish0139-139#976#1115
TOTALS158738-580
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing